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            <h1 style="display: none">TS与VUE3结合使用</h1>
            
            
              <div class="markdown-body">
                
                <h3 id="vue选项API中使用ts"><a href="#vue选项API中使用ts" class="headerlink" title="vue选项API中使用ts"></a>vue选项API中使用ts</h3><ul>
<li>defineComponent — 启用类型推导</li>
<li>类型断言 — 复杂类型注解</li>
<li>计算属性 — 显示标注返回类型</li>
</ul>
<p>选项api与ts结合使用：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div&gt;<br>    &lt;div&gt;&#123;&#123; count &#125;&#125;,&#123;&#123; doubleCount &#125;&#125;&lt;/div&gt;<br>    &lt;button @click=&quot;handleClick(2)&quot;&gt;dianji&lt;/button&gt;<br>  &lt;/div&gt;<br>&lt;/template&gt;<br>  <br>&lt;script lang=&quot;ts&quot;&gt;<br>import &#123; defineComponent &#125; from &quot;vue&quot;;<br><br>type Count = string | number;<br>interface List &#123;<br>  username: string;<br>  age: number;<br>&#125;<br><br>export default defineComponent(&#123;<br>  data() &#123;<br>    return &#123;<br>      count: 123 as Count,<br>      list: [] as List[],<br>    &#125;;<br>  &#125;,<br>  computed: &#123;<br>    doubleCount(): number | string &#123;<br>      // 类型保护<br>      if (typeof this.count === &quot;number&quot;) &#123;<br>        return this.count * 2;<br>      &#125; else &#123;<br>        return this.count;<br>      &#125;<br>    &#125;,<br>  &#125;,<br>  mounted() &#123;<br>    this.count = 2;<br>    this.list.push(&#123;<br>      username: &quot;tom&quot;,<br>      age: 18,<br>    &#125;);<br>  &#125;,<br>  methods: &#123;<br>    handleClick(n: number) &#123;<br>      if (typeof this.count === &quot;number&quot;) &#123;<br>        this.count += n;<br>      &#125;<br>    &#125;,<br>  &#125;,<br>&#125;);<br>&lt;/script&gt;<br></code></pre></td></tr></table></figure>

<hr>
<h3 id="vue选项api中组件通信使用ts"><a href="#vue选项api中组件通信使用ts" class="headerlink" title="vue选项api中组件通信使用ts"></a>vue选项api中组件通信使用ts</h3><ul>
<li>父子通信 — props+PropType</li>
<li>子父通信 — emits + 对象方式</li>
</ul>
<p>父：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div&gt;<br>    &lt;sonView :count=&quot;count&quot; :list=&quot;list&quot; @getData=&quot;getData&quot; /&gt;<br>  &lt;/div&gt;<br>&lt;/template&gt;<br>  <br>&lt;script lang=&quot;ts&quot;&gt;<br>import &#123; defineComponent &#125; from &quot;vue&quot;;<br>import sonView from &quot;./sonView.vue&quot;;<br><br>export default defineComponent(&#123;<br>  data() &#123;<br>    return &#123;<br>      count: &quot;123&quot;,<br>      list: [<br>        &#123;<br>          name: &quot;tom&quot;,<br>          age: 123,<br>        &#125;,<br>      ],<br>    &#125;;<br>  &#125;,<br>  components: &#123;<br>    sonView,<br>  &#125;,<br>  methods: &#123;<br>    getData(payload: string) &#123;<br>      console.log(payload);<br>    &#125;,<br>  &#125;,<br>&#125;);<br>&lt;/script&gt; <br></code></pre></td></tr></table></figure>

<p>子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div&gt;456&lt;/div&gt;<br>&lt;/template&gt;<br>  <br>&lt;script lang=&quot;ts&quot;&gt;<br>import &#123; defineComponent &#125; from &quot;vue&quot;;<br>import type &#123; PropType &#125; from &quot;vue&quot;;<br><br>interface List &#123;<br>  name: string;<br>  age: number;<br>&#125;<br><br>export default defineComponent(&#123;<br>  props: &#123;<br>    count: [Number, String],<br>    list: Object as PropType&lt;List[]&gt;, // 断言 泛型<br>  &#125;,<br>  // emits:[&quot;getData&quot;], // 这种写法无法限定类型<br>  //类型注解<br>  emits: &#123;<br>    getData(payload: string) &#123;<br>      return payload.length &gt; 0;<br>    &#125;,<br>  &#125;,<br>  mounted() &#123;<br>    this.$emit(&quot;getData&quot;, &quot;123&quot;);<br>  &#125;,<br>&#125;);<br>&lt;/script&gt; <br></code></pre></td></tr></table></figure>

<hr>
<h3 id="vue组合api中使用ts"><a href="#vue组合api中使用ts" class="headerlink" title="vue组合api中使用ts"></a>vue组合api中使用ts</h3><ul>
<li>默认 — 自动类型注解</li>
<li>泛型 — 复杂类型注解</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div&gt;<br>    &#123;&#123; num &#125;&#125;<br>    &#123;&#123; douNum &#125;&#125;<br>    &lt;button @click=&quot;handleClick(2)&quot;&gt;dianji&lt;/button&gt;<br>  &lt;/div&gt;<br>&lt;/template&gt;<br>  <br>&lt;script setup lang=&quot;ts&quot;&gt;<br>import &#123; computed, reactive, ref &#125; from &quot;vue&quot;;<br><br>// interface List&#123;<br>//   name: string,<br>//   age: number<br>// &#125;<br><br>// let count = ref&lt;number|string&gt;(0) //泛型<br>// count.value = &quot;123&quot;<br><br>// let list = reactive&lt;List[]&gt;([])<br>// list.push(&#123;<br>//   name:&quot;abc&quot;,<br>//   age:18<br>// &#125;)<br><br>let num = ref(2);<br>let douNum = computed(() =&gt; num.value * 2);<br>function handleClick(n: number) &#123;<br>  num.value += n;<br>&#125;<br>&lt;/script&gt; <br></code></pre></td></tr></table></figure>

<hr>
<h3 id="vue组合api中组件通信使用ts"><a href="#vue组合api中组件通信使用ts" class="headerlink" title="vue组合api中组件通信使用ts"></a>vue组合api中组件通信使用ts</h3><ul>
<li>父子 — defineProps + 泛型</li>
<li>子父 — defineEmits + 泛型</li>
</ul>
<p>父：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div&gt;<br>    &lt;sonView :count=&quot;count&quot; :list=&quot;list&quot; @getData=&quot;getData&quot; /&gt;<br>  &lt;/div&gt;<br>&lt;/template&gt;<br><br>&lt;script setup lang=&quot;ts&quot;&gt;<br>import &#123; reactive, ref &#125; from &quot;vue&quot;;<br>import sonView from &quot;./sonView.vue&quot;;<br>let count = ref(1);<br>let list = reactive(&#123;<br>  name: &quot;tom&quot;,<br>  age: 18,<br>&#125;);<br>function getData(n: number) &#123;<br>  console.log(n);<br>&#125;<br>&lt;/script&gt; <br></code></pre></td></tr></table></figure>

<p>子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;div&gt;son&lt;/div&gt;<br>&lt;/template&gt;<br>  <br>&lt;script setup lang=&quot;ts&quot;&gt;<br>import &#123; defineProps, defineEmits &#125; from &quot;vue&quot;;<br><br>// 方式1.<br>// defineProps(&#123;<br>//   count:[Number,String]<br>// &#125;)<br><br>// 方式2.<br>// interface Props&#123;<br>// count:number|string<br>// &#125;<br>// defineProps&lt;Props&gt;()<br><br>//------------------------------------<br><br>// interface Props&#123;<br>// list:&#123;<br>//   name:string,<br>//   age: number<br>// &#125;<br>// &#125;<br>// defineProps&lt;Props&gt;()<br><br>interface Emit &#123;<br>  (e: &quot;getData&quot;, n: number): void;<br>&#125;<br><br>let emit = defineEmits&lt;Emit&gt;();<br>emit(&quot;getData&quot;, 12);<br>&lt;/script&gt; <br></code></pre></td></tr></table></figure>

<hr>
<h3 id="VueRouter路由使用ts"><a href="#VueRouter路由使用ts" class="headerlink" title="VueRouter路由使用ts"></a>VueRouter路由使用ts</h3><ul>
<li>RouteRecordRaw — 路由表选项类型</li>
<li>RouteMeta — 扩展meta的类型</li>
<li>RouteOptions — createRouter的配置类型</li>
<li>RouteLocationNormalized — 标准化的路由地址</li>
<li>Router — router示例的类型</li>
</ul>
<hr>
<h3 id="vuex状态管理中使用ts"><a href="#vuex状态管理中使用ts" class="headerlink" title="vuex状态管理中使用ts"></a>vuex状态管理中使用ts</h3><p><a target="_blank" rel="noopener" href="https://vuex.vuejs.org/zh/guide/typescript-support.html">https://vuex.vuejs.org/zh/guide/typescript-support.html</a></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><code class="hljs javascript">导出key：<span class="hljs-keyword">export</span> <span class="hljs-keyword">const</span> <span class="hljs-attr">key</span>: <span class="hljs-title class_">InjectionKey</span>&lt;<span class="hljs-title class_">Store</span>&lt;<span class="hljs-title class_">StateAll</span>&gt;&gt; = <span class="hljs-title class_">Symbol</span>()<br><br>导入key：app.<span class="hljs-title function_">use</span>(store,key)<br><br>重写useStore：<span class="hljs-keyword">export</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">useStore</span>(<span class="hljs-params"></span>)&#123;<br>  <span class="hljs-keyword">return</span> <span class="hljs-title function_">baseUseStore</span>(key)<br>&#125;<br></code></pre></td></tr></table></figure>

<hr>
<h3 id="Element-Plus中使用TS"><a href="#Element-Plus中使用TS" class="headerlink" title="Element Plus中使用TS"></a>Element Plus中使用TS</h3><p>如果想在ts中有提示，使用volar</p>
<p>如果使用<code>volar</code>，需在<code>tsconfig.json</code>中通过<code>compilerOptions.types</code>指定全局组件类型<code>&quot;types&quot;:[&quot;element-plus/global&quot;]</code></p>
<figure class="highlight awk"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><code class="hljs awk"><span class="hljs-regexp">//</span> tsconfig.json<br>&#123;<br>  <span class="hljs-string">&quot;compilerOptions&quot;</span>: &#123;<br>    <span class="hljs-regexp">//</span> ...<br>    <span class="hljs-string">&quot;types&quot;</span>: [<span class="hljs-string">&quot;element-plus/global&quot;</span>]<br>  &#125;<br>&#125;<br></code></pre></td></tr></table></figure>






                
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